|
|
A component of an ILS consisting of a VHF transmitter, radiating signals in the direction served by the ILS, to provide a straight line descent path in the vertical plane containing the centre line of the runway.
|
Rules:
- The position given by GEO_LAT, GEO_LONG must be plausibly close (less than 1 KM) to that of the end of the related (through ILS) RWY_DIRECTION.
|
|
|
Attributes
|
|
CODE_ID
[Identification]
mandatory
|
|
|
The coded identification of the ILS localizer.
|
|
|
Domain:
CODE_ID_ILS_MLS
|
|
VAL_FREQ
[Frequency]
mandatory
|
|
|
The frequency of the ILS localizer.
|
|
|
Notes:
|
|
|
ILS frequencies shall be in the band : 108MHz - 117.975MHz.
|
|
|
Rules:
- The value of the VAL_FREQ has to lie between 108 MHz and 111.975 MHz (see ICAO Annex 10, Vol. 1, section 3.1.3.2).
|
|
|
Domain:
VAL_FREQ
|
|
UOM_FREQ
[Unit of measurement [frequency]]
mandatory
|
|
|
The unit of measurement of the frequency.
|
|
|
Domain:
UOM_FREQ
|
|
CODE_EM
[Emission]
optional
|
|
|
A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference. For example, A3E, NONA2a, G1D, etc..
|
|
|
Domain:
CODE_EM_RDO
|
|
VAL_MAG_BRG
[Magnetic bearing]
optional
|
|
|
The magnetic bearing of the localizer beam, towards the localizer antenna.
|
|
|
Rules:
- The difference between VAL_MAG_BRG of the ILS_LLZ and VAL_MAG_BRG of the related RWY_DIRECTION cannot exceed 10 degrees (see ICAO Doc 8168, PANS OPS, Chapter 23, 'Offset Localizer').
|
|
|
Domain:
VAL_ANGLE_BRG
|
|
VAL_TRUE_BRG
[True bearing]
optional
|
|
|
The true bearing of the localizer beam, towards the localizer antenna.
|
|
|
Rules:
- The difference between VAL_TRUE_BRG and VAL_MAG_BRG has to be consistent with the value VAL_MAG_VAR in the referred AD_HP, taking in consideration the current date and the annual rate of change (VAL_MAG_VAR_CHG in the referred AD_HP).
|
|
|
Domain:
VAL_ANGLE_BRG
|
|
VAL_MAG_VAR
[Magnetic variation]
optional
|
|
|
The angular difference between True North and Magnetic North.
|
|
|
Rules:
- If VAL_MAG_VAR is specified, then DATE_MAG_VAR is mandatory..
|
|
|
Domain:
VAL_ANGLE_MAG_VAR
|
|
DATE_MAG_VAR
[Magnetic variation date]
optional
|
|
|
The year when the magnetic variation was measured.
|
|
|
Domain:
DATE_YEAR
|
|
VAL_WID_COURSE
[Course width in degrees]
optional
|
|
|
The localizer course width, in degrees.
|
|
|
Domain:
VAL_ANGLE
|
|
CODE_TYPE_USE_BACK
[Usability of the localizer signal in the back course sector]
optional
|
|
|
A code indicating the usability of the localizer signal in the back course sector.
|
|
|
Domain:
CODE_TYPE_USE_BACK_ILS
|
|
GEO_LAT
[Latitude]
mandatory
|
|
|
The latitude of the position of the ILS localizer.
|
|
|
Domain:
GEO_LAT
|
|
GEO_LONG
[Longitude]
mandatory
|
|
|
The longitude of the position of the ILS localizer.
|
|
|
Domain:
GEO_LONG
|
|
CODE_DATUM
[Datum]
mandatory
|
|
|
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
|
|
|
Rules:
- All geographical coordinates should be expressed in the WGS 84 system.
|
|
|
Domain:
CODE_DATUM
|
|
VAL_GEO_ACCURACY
[Geographical accuracy]
optional
|
|
|
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- VAL_GEO_ACCURACY may be specified only if GEO_LAT and GEO_LONG have been specified and, in this situation, UOM_GEO_ACCURACY is mandatory.
|
|
|
Domain:
VAL_DIST_HORZ
|
|
UOM_GEO_ACCURACY
[Unit of measurement [geographical accuracy]]
optional
|
|
|
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
|
|
|
Domain:
UOM_DIST_HORZ
|
|
VAL_ELEV
[Elevation]
optional
|
|
|
The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
|
|
|
Rules:
- If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_ELEV_ACCURACY
[Elevation accuracy]
optional
|
|
|
The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_GEOID_UNDULATION
[Geoid undulation]
optional
|
|
|
A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
|
|
|
Rules:
- VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
UOM_DIST_VER
[Unit of measurement [vertical distance]]
optional
|
|
|
The unit of measurement for vertical distances: elevation, geoidal undulation.
|
|
|
Domain:
UOM_ELEV
|
|
VAL_CRC
[Cyclic redundancy check]
optional
|
|
|
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
|
|
|
Notes:
|
|
|
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
|
|
|
Domain:
VAL_HEX
|
|
TXT_VER_DATUM
[Vertical Datum]
optional
|
|
|
Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example, "AMSTERDAM GAUGE", "NEWLYN" etc.).
|
|
|
Domain:
TXT_DESCR
|
|
TXT_RMK
[Remark]
optional
|
|
|
|
|
|
Domain:
TXT_RMK
|
|
|
|
An area situated in the vicinity of a runway, FATO or TLOF, provided to protect aircraft during manoeuvring, take-off and/or landing operations.
|
|
|
Attributes
|
|
VAL_WID
[Width]
optional
|
|
|
The value of the physical width of the protection area.
|
|
|
Rules:
- If VAL_WID is specified, then UOM_DIM is mandatory.
|
|
|
Domain:
VAL_DIST_HORZ
|
|
VAL_LEN
[Length]
optional
|
|
|
The value of the physical length of the protection area.
|
|
|
Rules:
- If VAL_LEN is specified, then UOM_DIM is mandatory.
|
|
|
Domain:
VAL_DIST_HORZ
|
|
UOM_DIM
[Unit of measurement [horizontal dimension]]
optional
|
|
|
The unit of measurement for the horizontal dimensions of the protection area.
|
|
|
Domain:
UOM_DIST_HORZ
|
|
[CODE_COMPOSITION]
DEPRECATED-4.5
[Surface composition]
optional
|
|
|
A code indicating the composition of the protection area surface. For example, asphalt, concrete etc..
|
|
|
Domain:
CODE_COMPOSITION_SFC
|
|
CODE_STS
[Operational status]
optional
|
|
|
A code indicating the operational status of a protection area. For example, serviceable, unserviceable, closed, work in progress, etc.
|
|
|
Domain:
CODE_STS_SFC
|
|
TXT_LGT
[Lighting system description]
optional
|
|
|
A textual description of the lighting system on the protection area.
|
|
|
Domain:
TXT_DESCR
|
|
TXT_RMK
[Remark]
optional
|
|
|
|
|
|
Domain:
TXT_RMK
|
|
|
|
(ICAO) A marker beacon serving to identify a particular location in space by means of a 75MHz transmitter which transmits a directional signal to be received by aircraft flying overhead.
|
|
|
Attributes
|
|
CODE_ID
[Identification]
mandatory
|
|
|
The coded identification of the marker. E.g. Dots, Dashes, Dot/Dash, etc..
|
|
|
Rules:
- The only allowable characters are '.' (#002E) and '-' (#002D). For example, '-.-' meaning 'dash-dot-dash', '-' meaning 'dashes', etc...
|
|
|
Domain:
CODE_ID_MKR
|
|
GEO_LAT
[Latitude]
mandatory
|
|
|
The latitude of the position of the radio marker.
|
|
|
Domain:
GEO_LAT
|
|
GEO_LONG
[Longitude]
mandatory
|
|
|
The longitude of the position of the radio marker.
|
|
|
Domain:
GEO_LONG
|
|
CODE_CLASS
[Classification]
optional
|
|
|
A code indicating the class of the radio marker. For example, fan marker, low-powered fan marker, Z marker.
|
|
|
Domain:
CODE_CLASS_MKR
|
|
CODE_PSN_ILS
[Position]
optional
|
|
|
A code indicating the position, in a real or virtual ILS, of the markers situated on the centreline of a runway. For example: outer, middle, etc..
|
|
|
Notes:
|
|
|
Even when there is no ILS installed, the markers on the centreline of the runway are still referred to as "Inner Marker", "Middle Marker", etc..
|
|
|
Domain:
CODE_PSN_ILS
|
|
VAL_FREQ
[Frequency]
mandatory
|
|
|
The value of the radio emission frequency.
|
|
|
Notes:
|
|
|
Radio Markers, as defined by ICAO, work only on the frequency of 75MHz.
|
|
|
Rules:
- The value of the VAL_FREQ must be 75 (MHz).
|
|
|
Domain:
VAL_FREQ
|
|
UOM_FREQ
[Unit of measurement [frequency]]
mandatory
|
|
|
The unit of measurement of the frequency.
|
|
|
Notes:
|
|
|
Radio Markers, as defined by ICAO, work only on the frequency of 75MHz.
|
|
|
Domain:
UOM_FREQ
|
|
TXT_NAME
[Name]
optional
|
|
|
The name of an en-route marker, if any.
|
|
|
Domain:
TXT_NAME
|
|
VAL_AXIS_BRG
[True bearing of the minor axis of the marker beacon]
optional
|
|
|
The true bearing of the minor axis of the marker beacon. (source: ARINC 424 Specification)
|
|
|
Domain:
VAL_ANGLE_BRG
|
|
CODE_EM
[Emission]
optional
|
|
|
A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference. For example, A3E, NONA2a, G1D, etc..
|
|
|
Domain:
CODE_EM_RDO
|
|
CODE_DATUM
[Datum]
mandatory
|
|
|
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
|
|
|
Rules:
- All geographical coordinates should be expressed in the WGS 84 system.
|
|
|
Domain:
CODE_DATUM
|
|
VAL_GEO_ACCURACY
[Geographical accuracy]
optional
|
|
|
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- If VAL_GEO_ACCURACY is specified, then UOM_GEO_ACCURACY is mandatory.
|
|
|
Domain:
VAL_DIST_HORZ
|
|
UOM_GEO_ACCURACY
[Unit of measurement [geographical accuracy]]
optional
|
|
|
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
|
|
|
Domain:
UOM_DIST_HORZ
|
|
VAL_ELEV
[Elevation]
optional
|
|
|
The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
|
|
|
Rules:
- If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_ELEV_ACCURACY
[Elevation accuracy]
optional
|
|
|
The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_GEOID_UNDULATION
[Geoid undulation]
optional
|
|
|
A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
|
|
|
Rules:
- VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
UOM_DIST_VER
[Unit of measurement [vertical distance]]
optional
|
|
|
The unit of measurement for vertical distances: elevation, geoidal undulation.
|
|
|
Domain:
UOM_ELEV
|
|
VAL_CRC
[Cyclic redundancy check]
optional
|
|
|
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
|
|
|
Notes:
|
|
|
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
|
|
|
Domain:
VAL_HEX
|
|
TXT_VER_DATUM
[Vertical Datum]
optional
|
|
|
Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example,: "AMSTERDAM GAUGE", "NEWLYN" etc.).
|
|
|
Domain:
TXT_DESCR
|
|
TXT_RMK
[Remark]
optional
|
|
|
|
|
|
Domain:
TXT_RMK
|
|
|
|
A radio aid to navigation which provides precision navigation guidance for exact alignment and descent of aircraft on approach to a runway. It provides azimuth, elevation and distance indications.
(ICAO, An. 10) A precision approach and landing guidance system which provides position information and various ground-to-air data. The position information is provided in a wide coverage sector and is determined by an azimuth angle measurement and a range (distance) measurement.
|
|
|
Attributes
|
|
CODE_ID
[Identification]
mandatory
|
|
|
The coded identification of the Microwave Landing System.
|
|
|
Domain:
CODE_ID_ILS_MLS
|
|
CODE_CAT
[Category]
mandatory
|
|
|
A code indicating the category of the Microwave Landing System.
|
|
|
Domain:
CODE_CAT_LDG_AID
|
|
CODE_CHANNEL
[Channel]
mandatory
|
|
|
A code indicating the channel on which the Microwave Landing System is operating.
|
|
|
Domain:
CODE_CHANNEL_MLS
|
|
TXT_RMK
[Remark]
optional
|
|
|
This attribute is present to cover any additional information. For example, whether the configuration according to Annex 10 is 'Basic' or 'Expanded'.
|
|
|
Domain:
TXT_RMK
|
|
|
|
A component of an MLS consisting of an SHF transmitter and associated equipment, radiating signals in a volume of airspace served by the MLS, thereby furnishing azimuth indications to aircraft approaching the runway or back azimuth indications to aircraft departing from the runway or performing a missed approach procedure.
|
Rules:
- The position given by GEO_LAT, GEO_LONG must be plausibly close (less than 1 KM) to that of the end of the related (through MSL) RWY_DIRECTION.
|
|
|
Attributes
|
|
CODE_TYPE
[Type]
mandatory
|
|
|
A code indicating if it is 'normal' or 'back' azimuth equipment.
|
|
|
Domain:
CODE_TYPE_AZM
|
|
VAL_TRUE_BRG
[True bearing]
optional
|
|
|
The true bearing of the azimuth beam, towards the azimuth antenna.
|
|
|
Rules:
- The difference between VAL_TRUE_BRG and VAL_MAG_BRG has to be consistent with the value VAL_MAG_VAR in the related AD_HP, taking into consideration the current date and the annual rate of change (VAL_MAG_VAR_CHG in the related AD_HP).
|
|
|
Domain:
VAL_ANGLE_BRG
|
|
VAL_MAG_BRG
[Magnetic bearing]
optional
|
|
|
The magnetic bearing of the azimuth beam, towards the azimuth antenna.
|
|
|
Rules:
- The difference between VAL_MAG_BRG of the MLS_AZIMUTH and VAL_MAG_BRG of the related RWY_DIRECTION cannot exceed 10 degrees (see ICAO Doc 8168, PANS OPS, Chapter 23, 'Offset Localizer').
|
|
|
Domain:
VAL_ANGLE_BRG
|
|
VAL_MAG_VAR
[Magnetic variation]
optional
|
|
|
The angular difference between True North and Magnetic North.
|
|
|
Rules:
- If VAL_MAG_VAR is specified, then DATE_MAG_VAR is mandatory..
|
|
|
Domain:
VAL_ANGLE_MAG_VAR
|
|
DATE_MAG_VAR
[Magnetic variation date]
optional
|
|
|
The year when the magnetic variation was measured.
|
|
|
Domain:
DATE_YEAR
|
|
GEO_LAT
[Latitude]
mandatory
|
|
|
The latitude of the position of the transmitter.
|
|
|
Domain:
GEO_LAT
|
|
GEO_LONG
[Longitude]
mandatory
|
|
|
The longitude of the position the transmitter.
|
|
|
Domain:
GEO_LONG
|
|
CODE_DATUM
[Datum]
mandatory
|
|
|
A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
|
|
|
Rules:
- All geographical coordinates should be expressed in the WGS 84 system.
|
|
|
Domain:
CODE_DATUM
|
|
VAL_GEO_ACCURACY
[Geographical accuracy]
optional
|
|
|
The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- If VAL_GEO_ACCURACY is specified, then UOM_GEO_ACCURACY is mandatory.
|
|
|
Domain:
VAL_DIST_HORZ
|
|
UOM_GEO_ACCURACY
[Unit of measurement [geographical accuracy]]
optional
|
|
|
The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
|
|
|
Domain:
UOM_DIST_HORZ
|
|
VAL_ELEV
[Elevation]
optional
|
|
|
The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
|
|
|
Rules:
- If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_ELEV_ACCURACY
[Elevation accuracy]
optional
|
|
|
The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
|
|
|
Rules:
- VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
VAL_GEOID_UNDULATION
[Geoid undulation]
optional
|
|
|
A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
|
|
|
Rules:
- VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
|
|
|
Domain:
VAL_DIST_VER
|
|
UOM_DIST_VER
[Unit of measurement [vertical distance]]
optional
|
|
|
The unit of measurement for vertical distances: elevation, geoidal undulation.
|
|
|
Domain:
UOM_ELEV
|
|
VAL_CRC
[Cyclic redundancy check]
optional
|
|
|
Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
|
|
|
Notes:
|
|
|
Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
|
|
|
Domain:
VAL_HEX
|
|
TXT_VER_DATUM
[Vertical Datum]
optional
|
|
|
Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example, "AMSTERDAM GAUGE", "NEWLYN" etc.).
|
|
|
Domain:
TXT_DESCR
|
|
VAL_ANGLE_PROP_LEFT
[Left angle of proportionality]
optional
|
|
|
The value of the angle within which the azimuth indication is proportional to the deviation from the azimuth zero indication direction, and left of this direction from the azimuth antenna.
|
|
|
Domain:
VAL_ANGLE
|
|
VAL_ANGLE_PROP_RIGHT
[Right angle of proportionality]
optional
|
|
|
The value of the angle within which the azimuth indication is proportional to the deviation from the azimuth zero indication direction, and right of this direction from the azimuth antenna.
|
|
|
Domain:
VAL_ANGLE
|
|
VAL_ANGLE_COVER_LEFT
[Left angle of coverage]
optional
|
|
|
The value of the angle from the zero indication direction within which the azimuth indication is usable, and left of this direction from the azimuth antenna.
|
|
|
Rules:
- VAL_ANGLE_COVER_LEFT must be greater than VAL_ANGLE_PROP_LEFT.
|
|
|
Domain:
VAL_ANGLE
|
|
VAL_ANGLE_COVER_RIGHT
[Right angle of coverage]
optional
|
|
|
The value of the angle from the zero indication direction within which the azimuth indication is usable, and right of this direction from the azimuth antenna.
|
|
|
Rules:
- VAL_ANGLE_COVER_RIGHT must be greater than VAL_ANGLE_PROP_RIGHT.
|
|
|
Domain:
VAL_ANGLE
|
|
TXT_RMK
[Remark]
optional
|
|
|
|
|
|
Domain:
TXT_RMK
|
|
|
|
A component of an MLS consisting of an SHF transmitter, and associated equitment radiating signals within a volume of airspace served by the MLS, thereby furnishing elevation information as an angular value to aircraft approaching the runway.
|
Rules:
- The position given by GEO_LAT, GEO_LONG must be plausibly close (less than 1 KM) to that of the threshold of the related (through MLS) RWY_DIRECTION.
|
|
|
Attributes
|
|
VAL_ANGLE_NML
[Nominal glide path angle]
optional
|
|
|
The normal glide path angle for the MLS installation.
|
|
|
Rules:
- VAL_ANGLE_NML must be greater than VAL_ANGLE_MNM.
|
|
|
Domain:
VAL_ANGLE
|
|
VAL_ANGLE_MNM
[Minimum angle]
optional
|
|
|
The value of the lowest elevation angle authorized for an MLS procedure.
|
|
|
Domain:
VAL_ANGLE
|
|
VAL_ANGLE_SPAN
[Span angle]
optional
|
|
|
The value of the span angle of the elevation transmitter signal between the lower and the upper limits.
|
|
|
Domain:
VAL_ANGLE
|
|
GEO_LAT
[Latitude]
mandatory
|
|
|
The latitude of the position of the transmitter.
|
|
|
Domain:
GEO_LAT
|
|
GEO_LONG
[Longitude]
mandatory
|
|
|
The longitude of the position of the transmitter.
|
|
|
Domain:
GEO_LONG
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CODE_DATUM
[Datum]
mandatory
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A code indicating the geodetic datum in which the geographical co-ordinates are expressed.
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Rules:
- All geographical coordinates should be expressed in the WGS 84 system.
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Domain:
CODE_DATUM
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VAL_GEO_ACCURACY
[Geographical accuracy]
optional
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The horizontal distance from the stated geographical position within which there is a defined confidence of the true position falling.
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Rules:
- If VAL_GEO_ACCURACY is specified, then UOM_GEO_ACCURACY is mandatory.
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Domain:
VAL_DIST_HORZ
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UOM_GEO_ACCURACY
[Unit of measurement [geographical accuracy]]
optional
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The unit of measurement for the value expressing the accuracy of the geographical co-ordinates.
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Domain:
UOM_DIST_HORZ
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VAL_ELEV
[Elevation]
optional
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The vertical distance of the position from Mean Sea Level. The geoidal height of the position.
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Rules:
- If VAL_ELEV is specified, then UOM_DIST_VER is mandatory.
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Domain:
VAL_DIST_VER
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VAL_ELEV_ACCURACY
[Elevation accuracy]
optional
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The vertical distance from the stated elevation within which there is a defined confidence of the true position falling.
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Rules:
- VAL_ELEV_ACCURACY may be specified only if VAL_ELEV has been specified.
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Domain:
VAL_DIST_VER
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VAL_GEOID_UNDULATION
[Geoid undulation]
optional
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A distance separating the geoid and the ellipsoid at that position. In respect of WGS-84 geodetic datum, the difference between the WGS-84 ellipsoidal height and geoidal height represents geoidal undulation.
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Rules:
- VAL_GEOID_UNDULATION may be specified only if VAL_ELEV has been specified.
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Domain:
VAL_DIST_VER
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UOM_DIST_VER
[Unit of measurement [vertical distance]]
optional
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The unit of measurement for vertical distances: elevation, geoidal undulation.
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Domain:
UOM_ELEV
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VAL_CRC
[Cyclic redundancy check]
optional
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Hexadecimal value of a 32-bit polynominal cyclic redundancy check (CRC) over the values of a selected set of attributes that model critical, essential and routine data, according to ICAO Annex 15, item 3.2.10.
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Notes:
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Applications implementing the model shall decide and notify the specific attributes which are used for the CRC calculations, taking into consideration the requirements of the ICAO Annex 15.
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Domain:
VAL_HEX
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TXT_VER_DATUM
[Vertical Datum]
optional
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Attribute to take the "Vertical Datum" (viz. the tide gauge to determine MSL - for example, "AMSTERDAM GAUGE", "NEWLYN" etc.).
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Domain:
TXT_DESCR
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TXT_RMK
[Remark]
optional
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Domain:
TXT_RMK
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The lowest altitude that will provide a minimum clearance of 300m (1000ft) above all objects located in the sector.
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Rules:
- Two Minimum Sector Altitudes defined using VAL_ANGLE_FM, VAL_ANGLE_TO, VAL_DIST_INNER, and VAL_DIST_OUTER should not intersect each other.
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Attributes
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VAL_ANGLE_FM
[Beginning of angle]
mandatory
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The value of the 'from' (beginning) angle of an angle sector volume. The angle sector begins at VAL_ANGLE_FM and ends at VAL_ANGLE_TO.
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Rules:
- VAL_ANGLE_FM must have a value between 0 and 360 (degrees).
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Domain:
VAL_ANGLE_BRG
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VAL_ANGLE_TO
[Ending of angle]
mandatory
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The value of the 'to' or end angle of an angle sector volume.
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Rules:
- VAL_ANGLE_TO must have a value between 0 and 360 (degrees).
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Domain:
VAL_ANGLE_BRG
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VAL_DIST_INNER
[Angle sector volume inner limit]
optional
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The radius value of the inner circular boundary of the sector. If the sectors are based on an NDB co-located with a DME, or a VOR co-located with a DME, it is possible to define an additional circular boundary (DME arc) within a sector, dividing the sector into two sub-sectors, with the lower MSA value in the inner area. When this attribute has no value, it is assumed that the sector begins at the center.
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Rules:
- If specified, VAL_DIST_INNER must be smaller than VAL_DIST_OUTER.
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Domain:
VAL_DIST_HORZ
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VAL_DIST_OUTER
[Angle sector volume outer limit]
mandatory
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The radius value of the outer circular boundary of the sector. If the sectors are based on an NDB co-located with a DME, or a VOR co-located with a DME, it is possible to define an additional circular boundary (DME arc) within a sector, dividing the sector into two sub-sectors, with the lower MSA value in the inner area. When this attribute has no value, it is assumed to be 46 Km.
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Rules:
- The radius of a sector (VAL_DIST_OUTER) can not be more than 50 NM..
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Domain:
VAL_DIST_HORZ
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UOM_DIST_HORZ
[Unit of measurement [horizontal distance]]
mandatory
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The unit of measurement for the radius of the inner and the outer circular boundaries.
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Domain:
UOM_DIST_HORZ
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VAL_DIST_VER
[Minimum sector altitude]
mandatory
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The value of the Minimum Sector Altitude.
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Rules:
- The value of VAL_DIST_VER cannot be less than 300 metres.
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Domain:
VAL_DIST_VER
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UOM_DIST_VER
[Unit of measurement [vertical distance]]
mandatory
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The unit of measurement for the MSA value.
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Rules:
- If the unit of measurement has the value 'FL' or 'SM', then the attribute CODE_DIST_VER must have the value 'STD' (standard pressure)..
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Domain:
UOM_DIST_VER
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CODE_DIST_VER
[Reference for the vertical distance]
mandatory
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A code indicating the base parameter for the MSA value.
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Domain:
CODE_DIST_VER
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TXT_RMK
[Remark]
optional
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Domain:
TXT_RMK
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A set of Minimum Sector Altitudes which completely describe an area centred on a significant point, usually contained within a sector of 46km (25NM) radius.
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Notes:
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The MINIMUM SECTOR ALTITUDE and the MINIMUM SECTOR ALTITUDE GROUP will have to be revised if the Terminal Arrival Area (TAA) Concept is implemented, as presented in the Draft RTCA DO201A - Industry Requirements for Aeronautical Information (item 3.4.3.2.1).
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Attributes
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CODE_TYPE_ANGLE
[Angle type]
mandatory
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A code indicating if the angle values used in the related MSA (VAL_ANGLE_FM, VAL_ANGLE_TO) are magnetic bearings, true bearings, or VOR radials.
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Domain:
CODE_TYPE_ANGLE_BRG
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CODE_REF_ANGLE
[Angle reference]
optional
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A code indicating whether the angle values used in the related MSA (VAL_ANGLE_FM and VAL_ANGLE_TO attributes) are either towards or from the reference point (navaid).
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Notes:
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When this value is not provided, it is considered that the angles are: - from the reference SIGNIFICANT_POINT in the case of a VOR or TACAN; - towards the reference SIGNIFICANT_POINT in all other cases.
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Domain:
CODE_DIR_REF
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TXT_RMK
[Remark]
optional
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Domain:
TXT_RMK
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A limitation, such as coverage, usability, etc., of a navaid inside a circular sector volume.
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Notes:
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Where CODE_TYPE = coverage (ICAO)The 'volume' of airspace within which the service is provided and where signal power density is equal to or greater than the specified minimum.
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Rules:
- If CODE_TYPE='CVR' ('coverage'), then VAL_DIST_OUTER is mandatory.
- If CODE_TYPE='SCL' ('scalloping'), then VAL_ANGLE_SCALLOP is mandatory.
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Attributes
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VAL_ANGLE_FM
[From bearing]
mandatory
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The value of the 'from' (beginning) angle of the circular sector. The sector of circle begins at VAL_ANGLE_FM and goes clockwise up to VAL_ANGLE_TO.
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Notes:
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1) When VAL_ANGLE_FM is greater than VAL_ANGLE_TO, it means from VAL_ANGLE_FM to 360 degrees and from 0 degree to VAL_ANGLE_TO; 2) When VAL_ANGLE_FM is equal to VAL_ANGLE_TO, it means for that angle only; 3) A full circle is indicated with the values VAL_ANGLE_FM=0 and VAL_ANGLE_TO=360.
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Domain:
VAL_ANGLE_BRG
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VAL_ANGLE_TO
[To bearing]
mandatory
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The value of the 'to' (end) angle of the circular sector.
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Domain:
VAL_ANGLE_BRG
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VAL_DIST_INNER
[Inner limit]
optional
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The value of the inner limit of the circular sector.
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Rules:
- If VAL_DIST_INNER is specified, then UOM_DIST_HORZ is mandatory.
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Domain:
VAL_DIST_HORZ
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VAL_DIST_OUTER
[Outer limit]
optional
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The value of the outer limit of the circular sector.
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Rules:
- If VAL_DIST_OUTER is specified, then UOM_DIST_HORZ is mandatory.
- VAL_DIST_OUTER must be greater than VAL_DIST_INNER.
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Domain:
VAL_DIST_HORZ
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UOM_DIST_HORZ
[Unit of measurement [horizontal distance]]
optional
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The unit of measurement for horizontal distances.
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Domain:
UOM_DIST_HORZ
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VAL_DIST_VER_UPPER
[Upper limit]
optional
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The value of the upper limit of the circular sector volume.
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Rules:
- If VAL_DIST_VER_UPPER is specified, then UOM_DIST_VER_UPPER and CODE_DIST_VER_UPPER are mandatory.
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Domain:
VAL_DIST_VER
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UOM_DIST_VER_UPPER
[Unit of measurement [upper limit]]
optional
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The unit of measurement for the upper limit value.
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Rules:
- If the unit of measurement has the value 'FL' or 'SM', then the attribute CODE_DIST_VER_UPPER must have the value 'STD' (standard pressure)..
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Domain:
UOM_DIST_VER
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CODE_DIST_VER_UPPER
[Reference for upper limit]
optional
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A code indicating the convention used to measure the value of the upper limit.
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Domain:
CODE_DIST_VER
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VAL_DIST_VER_LOWER
[Lower limit]
optional
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The value of the lower limit of the circular sector volume.
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Rules:
- If VAL_DIST_VER_LOWER is specified, then UOM_DIST_VER_LOWER and CODE_DIST_VER_LOWER are mandatory.
- If both VAL_DIST_VER_LOWER and VAL_DIST_VER_UPPER are specified, then the value of the lower limit must be smaller than or equal to the value of the upper limit (when converted to a common unit of measurement and reference system).
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Domain:
VAL_DIST_VER
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UOM_DIST_VER_LOWER
[Unit of measurement [lower limit]]
optional
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The unit of measurement for the lower limit value.
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Rules:
- If the unit of measurement has the value 'FL' or 'SM', then the attribute CODE_DIST_VER_LOWER must have the value 'STD' (standard pressure)..
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Domain:
UOM_DIST_VER
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CODE_DIST_VER_LOWER
[Reference for lower limit]
optional
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A code indicating the convention used to measure the value of the lower limit.
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Domain:
CODE_DIST_VER
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VAL_ANGLE_SCALLOP
[Scalloping angle]
optional
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The value of the scalloping angle, which may affect the radial reading of a VOR or TACAN in plus or minus.
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Rules:
- VAL_ANGLE_SCALLOP may be specified only for VOR or TACAN. .
- VAL_ANGLE_SCALLOP may be specified only if CODE_TYPE is 'SCL' or 'CVR'.
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Domain:
VAL_ANGLE
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TXT_RMK
[Remark]
optional
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Domain:
TXT_RMK
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A point established and marked on the surface of an aerodrome allowing the checking of a navigation system (like VOR, GNSS, etc.) or initialisation of an inertial navigation system.
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Attributes
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CODE_TYPE
[Type]
mandatory
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The type of navigation system for which the checkpoint has been established. For example, INS, VOR, GNSS, etc..
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Domain:
CODE_TYPE_NAV_CK_PT
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TXT_RMK
[Remark]
optional
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Domain:
TXT_RMK
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